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SENDMAIL(1)                                                        SENDMAIL(1)

NAME
       sendmail - Postfix to Sendmail compatibility interface

SYNOPSIS
       sendmail [option ...] [recipient ...]

       mailq
       sendmail -bp

       newaliases
       sendmail -I

DESCRIPTION
       The  Postfix sendmail(1) command implements the Postfix to
       Sendmail compatibility interface.  For the sake of compat-
       ibility with existing applications, some Sendmail command-
       line options are recognized but silently ignored.

       By default, Postfix sendmail(1) reads a message from stan-
       dard  input until EOF or until it reads a line with only a
       . character, and arranges  for  delivery.   Postfix  send-
       mail(1)  relies  on  the  postdrop(1)  command to create a
       queue file in the maildrop directory.

       Specific command aliases are  provided  for  other  common
       modes of operation:

       mailq  List  the  mail  queue.  Each entry shows the queue
              file ID, message size, arrival  time,  sender,  and
              the recipients that still need to be delivered.  If
              mail could not be delivered upon the last  attempt,
              the reason for failure is shown. This mode of oper-
              ation is implemented by executing the  postqueue(1)
              command.

       newaliases
              Initialize the alias database.  If no input file is
              specified (with the -oA  option,  see  below),  the
              program  processes  the  file(s) specified with the
              alias_database  configuration  parameter.   If   no
              alias  database type is specified, the program uses
              the type specified with  the  default_database_type
              configuration parameter.  This mode of operation is
              implemented by running the postalias(1) command.

              Note: it may take a minute or so  before  an  alias
              database  update  becomes visible. Use the "postfix
              reload" command to eliminate this delay.

       These and other features can be selected by specifying the
       appropriate combination of command-line options. Some fea-
       tures are controlled by parameters in the main.cf configu-
       ration file.

       The following options are recognized:

       -Am (ignored)

       -Ac (ignored)
              Postfix  sendmail  uses the same configuration file
              regardless of whether or not a message is  an  ini-
              tial submission.

       -B body_type
              The message body MIME type: 7BIT or 8BITMIME.

       -bd    Go  into  daemon  mode.  This  mode of operation is
              implemented by executing the "postfix  start"  com-
              mand.

       -bh (ignored)

       -bH (ignored)
              Postfix has no persistent host status database.

       -bi    Initialize  alias database. See the newaliases com-
              mand above.

       -bm    Read mail  from  standard  input  and  arrange  for
              delivery.  This is the default mode of operation.

       -bp    List the mail queue. See the mailq command above.

       -bs    Stand-alone  SMTP  server  mode. Read SMTP commands
              from standard input, and write responses  to  stan-
              dard output.  In stand-alone SMTP server mode, mail
              relaying and other access controls are disabled  by
              default.  To  enable  them,  run the process as the
              mail_owner user.

              This mode of operation is  implemented  by  running
              the smtpd(8) daemon.

       -bv    Do  not collect or deliver a message. Instead, send
              an email  report  after  verifying  each  recipient
              address.    This  is  useful  for  testing  address
              rewriting and routing configurations.

              This feature is available in  Postfix  version  2.1
              and later.

       -C config_file

       -C config_dir
              The  path  name  of the Postfix main.cf file, or of
              its parent directory. This information  is  ignored
              with Postfix versions before 2.3.

              With all Postfix versions, you can specify a direc-
              tory  pathname  with  the  MAIL_CONFIG  environment
              variable  to override the location of configuration
              files.

       -F full_name
              Set the sender full name. This overrides  the  NAME
              environment  variable,  and  is used only with mes-
              sages that have no From: message header.

       -f sender
              Set  the  envelope  sender  address.  This  is  the
              address  where  delivery problems are sent to. With
              Postfix versions before 2.1, the Errors-To: message
              header overrides the error return address.

       -G     Gateway  (relay)  submission, as opposed to initial
              user submission.  Either do not  rewrite  addresses
              at  all,  or  update  incomplete addresses with the
              domain information specified with remote_header_re-
              write_domain.

              This  option is ignored before Postfix version 2.3.

       -h hop_count (ignored)
              Hop count limit. Use the hopcount_limit  configura-
              tion parameter instead.

       -I     Initialize  alias database. See the newaliases com-
              mand above.

       -i     When reading a message from standard  input,  don't
              treat  a line with only a . character as the end of
              input.

       -L label (ignored)
              The logging label. Use the  syslog_name  configura-
              tion parameter instead.

       -m (ignored)
              Backwards compatibility.

       -N dsn (default: 'delay, failure')
              Delivery   status   notification  control.  Specify
              either a comma-separated list with one or  more  of
              failure  (send  notification  when delivery fails),
              delay (send notification when delivery is delayed),
              or  success  (send notification when the message is
              delivered); or specify never (don't send any  noti-
              fications at all).

              This feature is available in Postfix 2.3 and later.

       -n (ignored)
              Backwards compatibility.

       -oAalias_database
              Non-default alias  database.  Specify  pathname  or
              type:pathname. See postalias(1) for details.

       -O option=value (ignored)
              Backwards compatibility.

       -o7 (ignored)

       -o8 (ignored)
              To send 8-bit or binary content, use an appropriate
              MIME encapsulation and specify the  appropriate  -B
              command-line option.

       -oi    When  reading  a message from standard input, don't
              treat a line with only a . character as the end  of
              input.

       -om (ignored)
              The  sender  is  never  eliminated  from alias etc.
              expansions.

       -o x value (ignored)
              Set option x to value. Use the equivalent  configu-
              ration parameter in main.cf instead.

       -r sender
              Set  the  envelope  sender  address.  This  is  the
              address where delivery problems are sent  to.  With
              Postfix versions before 2.1, the Errors-To: message
              header overrides the error return address.

       -R return_limit (ignored)
              Limit  the  size   of   bounced   mail.   Use   the
              bounce_size_limit  configuration parameter instead.

       -q     Attempt to deliver all queued mail. This is  imple-
              mented by executing the postqueue(1) command.

              Warning:  flushing  undeliverable  mail  frequently
              will result in poor  delivery  performance  of  all
              other mail.

       -qinterval (ignored)
              The   interval   between   queue   runs.   Use  the
              queue_run_delay configuration parameter instead.

       -qRsite
              Schedule immediate delivery of  all  mail  that  is
              queued for the named site. This option accepts only
              site names that are eligible for the  "fast  flush"
              service,   and  is  implemented  by  executing  the
              postqueue(1) command.  See flush(8) for more infor-
              mation about the "fast flush" service.

       -qSsite
              This  command  is  not  implemented. Use the slower
              "sendmail -q" command instead.

       -t     Extract recipients from message headers. These  are
              added  to  any  recipients specified on the command
              line.

              With Postfix versions prior  to  2.1,  this  option
              requires  that no recipient addresses are specified
              on the command line.

       -U (ignored)
              Initial user submission.

       -V envid
              Specify the envelope ID for notification by servers
              that support DSN.

              This feature is available in Postfix 2.3 and later.

       -XV (Postfix 2.2 and earlier: -V)
              Variable Envelope Return Path.  Given  an  envelope
              sender  address  of the form owner-listname@origin,
              each recipient user@domain  receives  mail  with  a
              personalized envelope sender address.

              By   default,   the  personalized  envelope  sender
              address is  owner-listname+user=domain@origin.  The
              default  +  and  = characters are configurable with
              the default_verp_delimiters  configuration  parame-
              ter.

       -XVxy (Postfix 2.2 and earlier: -Vxy)
              As  -XV,  but  uses  x  and y as the VERP delimiter
              characters, instead  of  the  characters  specified
              with   the   default_verp_delimiters  configuration
              parameter.

       -v     Send an email report of the first delivery  attempt
              (Postfix  versions  2.1  and  later). Mail delivery
              always happens in the background. When multiple  -v
              options  are  given,  enable  verbose  logging  for
              debugging purposes.

       -X log_file (ignored)
              Log mailer traffic.  Use  the  debug_peer_list  and
              debug_peer_level  configuration parameters instead.

SECURITY
       By design, this program is not  set-user  (or  group)  id.
       However,  it  must  handle  data  from  untrusted users or
       untrusted machines.  Thus, the usual precautions  need  to
       be taken against malicious inputs.

DIAGNOSTICS
       Problems  are  logged  to  syslogd(8)  and to the standard
       error stream.

ENVIRONMENT
       MAIL_CONFIG
              Directory with Postfix configuration files.

       MAIL_VERBOSE (value does not matter)
              Enable verbose logging for debugging purposes.

       MAIL_DEBUG (value does not matter)
              Enable debugging with an external command, as spec-
              ified   with   the  debugger_command  configuration
              parameter.

       NAME   The sender full name. This is used only  with  mes-
              sages  that  have no From: message header. See also
              the -F option above.

CONFIGURATION PARAMETERS
       The following main.cf parameters are  especially  relevant
       to this program.  The text below provides only a parameter
       summary. See postconf(5) for more details including  exam-
       ples.

TROUBLE SHOOTING CONTROLS
       The  DEBUG_README  file  gives  examples of how to trouble
       shoot a Postfix system.

       debugger_command (empty)
              The external command to execute when a Postfix dae-
              mon program is invoked with the -D option.

       debug_peer_level (2)
              The  increment  in  verbose  logging  level  when a
              remote client or server matches a  pattern  in  the
              debug_peer_list parameter.

       debug_peer_list (empty)
              Optional  list  of remote client or server hostname
              or network address patterns that cause the  verbose
              logging  level  to increase by the amount specified
              in $debug_peer_level.

ACCESS CONTROLS
       Available in Postfix version 2.2 and later:

       authorized_flush_users (static:anyone)
              List of users  who  are  authorized  to  flush  the
              queue.

       authorized_mailq_users (static:anyone)
              List of users who are authorized to view the queue.

       authorized_submit_users (static:anyone)
              List of users who are  authorized  to  submit  mail
              with  the  sendmail(1) command (and with the privi-
              leged postdrop(1) helper command).

RESOURCE AND RATE CONTROLS
       bounce_size_limit (50000)
              The maximal amount of original message text that is
              sent in a non-delivery notification.

       fork_attempts (5)
              The  maximal  number  of attempts to fork() a child
              process.

       fork_delay (1s)
              The  delay  between  attempts  to  fork()  a  child
              process.

       hopcount_limit (50)
              The  maximal  number  of Received:  message headers
              that is allowed in the primary message headers.

       queue_run_delay (1000s)
              The time between deferred queue scans by the  queue
              manager.

FAST FLUSH CONTROLS
       The ETRN_README file describes configuration and operation
       details for the Postfix "fast flush" service.

       fast_flush_domains ($relay_domains)
              Optional list of destinations that are eligible for
              per-destination  logfiles  with mail that is queued
              to those destinations.

VERP CONTROLS
       The VERP_README file describes configuration and operation
       details  of  Postfix  support for variable envelope return
       path addresses.

       default_verp_delimiters (+=)
              The two default VERP delimiter characters.

       verp_delimiter_filter (-=+)
              The characters Postfix accepts  as  VERP  delimiter
              characters  on the Postfix sendmail(1) command line
              and in SMTP commands.

MISCELLANEOUS CONTROLS
       alias_database (see 'postconf -d' output)
              The alias databases for local(8) delivery that  are
              updated with "newaliases" or with "sendmail -bi".

       command_directory (see 'postconf -d' output)
              The  location  of  all  postfix administrative com-
              mands.

       config_directory (see 'postconf -d' output)
              The default location of  the  Postfix  main.cf  and
              master.cf configuration files.

       daemon_directory (see 'postconf -d' output)
              The  directory  with  Postfix  support programs and
              daemon programs.

       default_database_type (see 'postconf -d' output)
              The default database type for use in newaliases(1),
              postalias(1) and postmap(1) commands.

       delay_warning_time (0h)
              The  time  after which the sender receives the mes-
              sage headers of mail that is still queued.

       enable_errors_to (no)
              Report mail delivery errors to the  address  speci-
              fied   with  the  non-standard  Errors-To:  message
              header, instead  of  the  envelope  sender  address
              (this  feature is removed with Postfix version 2.2,
              is turned off by default with Postfix version  2.1,
              and  is  always  turned  on with older Postfix ver-
              sions).

       mail_owner (postfix)
              The UNIX system account that owns the Postfix queue
              and most Postfix daemon processes.

       queue_directory (see 'postconf -d' output)
              The  location of the Postfix top-level queue direc-
              tory.

       remote_header_rewrite_domain (empty)
              Don't rewrite message headers from  remote  clients
              at all when this parameter is empty; otherwise, re-
              write message  headers  and  append  the  specified
              domain name to incomplete addresses.

       syslog_facility (mail)
              The syslog facility of Postfix logging.

       syslog_name (postfix)
              The  mail  system  name  that  is  prepended to the
              process name in syslog  records,  so  that  "smtpd"
              becomes, for example, "postfix/smtpd".

FILES
       /var/spool/postfix, mail queue
       /etc/postfix, configuration files

SEE ALSO
       pickup(8), mail pickup daemon
       qmgr(8), queue manager
       smtpd(8), SMTP server
       flush(8), fast flush service
       postsuper(1), queue maintenance
       postalias(1), create/update/query alias database
       postdrop(1), mail posting utility
       postfix(1), mail system control
       postqueue(1), mail queue control
       syslogd(8), system logging

README_FILES
       DEBUG_README, Postfix debugging howto
       ETRN_README, Postfix ETRN howto
       VERP_README, Postfix VERP howto

LICENSE
       The  Secure  Mailer  license must be distributed with this
       software.

AUTHOR(S)
       Wietse Venema
       IBM T.J. Watson Research
       P.O. Box 704
       Yorktown Heights, NY 10598, USA

                                                                   SENDMAIL(1)